Question

包含待测对象的文件：foo.rb

class Foo
  def a_string
    "abcdef8"
  end
end

规范文件：foo_spec.rb

require_relative "./foo"

describe Foo do
  let(:foo) {Foo.new}
  let(:my_matcher) {/^[a-z]+(\d)$/}


  # This test passes

  it "should match and pass" do
    my_str = foo.a_string

    my_matcher # <--- why does this affect the test?

    matcher = my_str.match(my_matcher)
    8.should == matcher[1].to_i
  end

  # This test fails

  it "should also match and pass but fails" do
    my_str = foo.a_string

    #my_matcher #<---- the only change between the tests

    matcher = my_str.match(my_matcher)  #<---- when called here, it behaves differently
    8.should == matcher[1].to_i
  end
end

rspec foo_spec.rb

.F

Failures:

  1) Foo should also match and pass but fails
     Failure/Error: 8.should == matcher[1].to_i
     NoMethodError:
       undefined method `[]' for /^[a-z]+(\d)$/:Regexp
     # ./foo_spec.rb:18:in `block (2 levels) in <top (required)>'

Finished in 0.00095 seconds
2 examples, 1 failure

Failed examples:

rspec ./foo_spec.rb:14 # Foo should also match and pass but fails

两个测试的唯一区别是是否调用了my_matcher。我在检查my_matcher（即p my_matcher）时首先注意到了这个问题，但只是在调用my_matcher时也会出现这个问题。

这是一个错误，还是我做错了什么？也许它与捕获Regex数据有关？

这似乎非常奇怪，特别是对于红宝石。

为了它的价值，它是一个简单的（如果稍微减少DRY）修复。如果在my_matcher块中声明it，则按预期工作。

Answer 1

这看起来像个错误。你能用rspec-core提出问题吗？

在RSpec中，使用let来分配正则表达式会产生意外的通过/失败行为 - 错误或用户错误？

1 个答案: